Help with 1994 Super V700 - need to replace chainrings

Good day Cannondalers,

I am working on my wifes 1994 Super V 700 and need to replace her chainrings. I have no info on what to buy new or used. Anybody out there able to educate this ol boy in what to look for....and where? Oh yea....never taken one off before either (assistance needed here too).

I am also in the process of switching it over from the original 7-speed/twist grip, to an 8-speed/trigger shift. I think I understand this conversion......I think. I guess I'll know when my EBay parts show up.